A:AnswerYes, you can use it to FaceTime. You have to have an internet connection to do so; I do it at home with a wireless connection. I think some models let you use another type of connection, possibly with a cell phone carrier.
A:AnswerI’ve been told by repair shops that replacing anything inside an iPad involves massive destruction of the outer case rendering it garbage. Buy a new one.
A:AnswerThe iPad mini is like the iPhone..It comes with google maps. I downloaded Waze. There is no reason to believe it can't used for navigation. I use Waze which is paired with to my smart screen through Carplay.